基于HDPE/EPDM TPV的超疏水表面构建及性能研究

Fabrication and Properties of Superhydrophobic Surfaces Based on HDPE/EPDM TPV

以高密度聚乙烯(HDPE)/三元乙丙橡胶(EPDM)热塑性硫化胶(TPV)为原材料、金相砂纸为模板,通过模压法在TPV表面构建超疏水层。结果表明:以金相砂纸为模板可在TPV表面获得具有较高保真度的微米级粗糙结构,模压过程中TPV表面发生的塑性变形使其具有比砂纸表面更复杂的粗糙结构;模压TPV表面具有良好的疏水性,当磨料规格高于W14时,模压TPV表面与水的接触角可达150°,滚动角小于10°,符合Cassie模型;采用W10砂纸模压的TPV表面具有较好的疏水性能。

Superhydrophobic surfaces were constructed via molding method by using HDPE/EPDM TPV as raw material and metallographic sandpaper as a template. The result showed that,micron scale surface roughness of TPV with high fidelity could be prepared by using metallographic sandpaper as moldingtemplate. Moreover, the resulted TPV surface possessed more complex rough structure than the surface of metallographic sandpaper due to the plastic deformation during the press molding process. The surface of molded TPV had strong hydrophobicity character,when the abrasive mesh was higher than W14,the water contact angle of molded TPV surface reached 150° and the rolling angle was less than 10°,which was consistent with the Cassie model. The surface of TPV molded by W10 metallographic sandpaper had better hydrophobicity.